Colorful Tubes 4K Wallpaper

4K Ultra High Definition is a resolution of 3840×2160 as known as aspect ratio 16:9. 4K UHD has twice the horizontal and vertical resolution of the 1080p HDTV format. With 4x as many pixels overall. Likewise, 4K UHD has three times the horizontal and vertical resolution of the 720p format and 1080p, with nine times as many pixels overall.